Color conversion component and display device

ABSTRACT

A color conversion component and a display device. The color conversion component includes a light conversion layer including a black matrix, color conversion layers and concave-convex structure layers; the black matrix has a plurality of through holes arranged in an array; the color conversion layers are located within at least a portion of the through holes and capable of emitting a light in a wavelength range different than that of an incident light; and the concave-convex structure layers are arranged at least correspondingly in each of the through holes accommodating the color conversion layers, and each concave-convex structure layer is located on a light incident side of the light conversion layer and has a concave-convex structure surface facing towards the respective color conversion layer.

CROSS REFERENCE TO RELATED APPLICATION

This application is a continuation of International Application No.PCT/CN2019/123306 filed on Dec. 5, 2019, which claims the prioritybenefits of Chinese Patent Application No. 201910581659.3 filed on Jun.30, 2019 and entitled “COLOR CONVERSION COMPONENT AND DISPLAY DEVICE”,both of which are incorporated herein by reference in their entireties.

TECHNICAL FIELD

The application relates to the field of display, and in particular to acolor conversion component and a display device.

BACKGROUND

Micro-Light Emitting Diode (Micro-LED) technology may support thedisplay of color patterns through a variety of color schemes, forexample, by adding a light conversion layer. Although this measure canmeet the requirement for colorization, the structure design of theexisting light conversion layer is not reasonable, resulting in unevenlight intensity distribution when the light emitted by the Micro-LEDpasses through the light conversion layer, which affects the displayeffect of the display device.

SUMMARY

Embodiments of the application provide a color conversion component anda display device, wherein the color conversion component can meet therequirements for color display of a display device while enablinguniform light intensity distribution and ensuring the display effect ofthe display device.

In one aspect, a color conversion component is proposed in accordancewith embodiments of the application, which comprises a light conversionlayer comprising a black matrix, color conversion layers andconcave-convex structure layers; the black matrix has a plurality ofthrough holes arranged in an array; the color conversion layers arelocated within at least a portion of the through holes and capable ofemitting a light in a wavelength range different than that of anincident light; and the concave-convex structure layers are arranged atleast correspondingly in each of the through holes accommodating thecolor conversion layers, and each concave-convex structure layer islocated on a light incident side of the light conversion layer and has aconcave-convex structure surface facing towards the respective colorconversion layer.

In another aspect, a display device is proposed in accordance withembodiments of the application, which comprises a back plate componentcomprising a drive back plate and a light emitting layer arranged on thedrive back plate, the light emitting layer comprising a plurality oflight emitting units distributed in an array and a retaining wall, bywhich the adjacent light emitting units being separated from each other;the aforesaid color conversion component, the color conversion componentbeing stacked and abutted against the back plate component in athickness direction of the light conversion layer, each of the lightemitting units being arranged opposite to the through holes in the blackmatrix of the color conversion component in the thickness directionrespectively.

In the color conversion component and the display device providedaccording to embodiments of the application, the color conversioncomponent comprises a light conversion layer, and since the lightconversion layer comprises a black matrix, color conversion layers andconcave-convex structure layers, it is possible to emit a light in awavelength range different than that of the incident light by the colorconversion layers, so as to meet the full-color display requirement ofthe display device. Meanwhile, the concave-convex structure layersarranged in a corresponding way can diffuse the lights, thereby enablinguniform intensity distribution of the lights and ensuring the displayeffect of the display device.

BRIEF DESCRIPTION OF THE DRAWINGS

The features, advantages and technical effects of the exemplaryembodiments of the application will be described below with reference tothe drawings.

FIG. 1 is a schematic structural top view of a display panel of anembodiment of the application;

FIG. 2 is a schematic structural cross-sectional view of a display panelof an embodiment of the application;

FIG. 3 is a schematic structural cross-sectional view of a colorconversion component of an embodiment of the application;

FIG. 4 is a schematic structural cross-sectional view of the colorconversion component shown in FIG. 3 provided with an additionalreflective layer;

FIG. 5 is a schematic structural cross-sectional view of a raised crosssection and the color conversion component different from that of FIG.3;

FIG. 6 is a partial cross-sectional view of a baffle component of anembodiment of the application.

DETAILED DESCRIPTION

The features and embodiments of the application in various aspects willbe described in detail below. For clearly understanding of the purpose,technical solution and advantages of the application, the applicationwill be described in further details in combination with the drawingsand specific embodiments. It should be noted that the specificembodiments described herein are configured to explain the applicationrather than to limit it. A person skilled in the art may implement theapplication without some of these specific details. The followingdescription of the embodiments is for the purpose of betterunderstanding of the application through showing examples of theapplication.

For better understanding of the application, the color conversioncomponent and the display device according to the embodiments of theapplication will be described below in detail in combination with FIGS.1 to 6.

Please refer to FIGS. 1 and 2. FIG. 1 shows a schematic structural topview of a display device of an embodiment of the application, and FIG. 2shows a schematic structural cross-sectional view of a display device ofan embodiment of the application.

An embodiment of the application provides a display device comprising aback plate component 20 and a color conversion component 10. The backplate component 20 comprises a drive back plate 21 and a light emittinglayer 22 arranged on the drive back plate 21. The light emitting layer22 comprises a plurality of light emitting units 221 arranged in anarray and a retaining wall 222, by which the adjacent light emittingunits 221 are separated from each other. The color conversion component10 and the back plate component 20 are stacked and abutted against eachother.

Optionally, the drive back plate 21 of the back plate component 20 maycomprise a substrate base and a drive circuit arranged on the substratebase. The drive circuit may in particular comprise an active drivecircuit and/or a passive drive circuit.

The retaining wall 222 comprised in the light emitting layer 22 may bemade of an organic material, such as Cardo resin, polyimide resin, oracrylic resin, for improving the flatness of the surface of the backplate to facilitate connection with the color conversion component 10.The retaining wall 222 defines a plurality of accommodation portions,which may optionally be of a rectangular configuration. The height ofthe retaining wall 222 on the drive back plate 21 may be greater than orequal to that of the light emitting unit 221 the drive back plate 21.

A plurality of light emitting units 221 distributed in an array may bearranged in the accommodation portions and electrically connected todrive circuits respectively, by which respective light emitting unit 221is controlled. With the retaining wall 222 arranged between the adjacentlight emitting units 221, it is possible to prevent the lights emittedfrom the light emitting units 221 from interference with each other.

The light emitting units 221 may be micro light emitting diode chips. Insome optional examples, each of the light emitting units 221 may be ablue light micro light emitting diode chip, and each accommodationportion may be provided with one light emitting unit 221 therein. Ofcourse, two or more light emitting units 221 may be provided dependingon the size ratio of the accommodation portion to the light emittingunit 221, which is not particularly limited herein. In order tofacilitate the arrangement of the color conversion component 10,optionally, a side of the light emitting layer 22 away from the driveback plate 21 is planarized such that the light emitting layer 22 has aplanarized surface.

Optionally, the color conversion component 10 is located over theplanarized surface of the light emitting layer 22. In order to enablethe display device to accomplish full-color display while enablinguniform light intensity distribution and ensuring the display effect ofthe display device, optionally, embodiments of the application furtherprovide a color conversion component 10, which may be separatelyproduced, sold, etc. as a separate member. Of course, it may also beused in the display device of each of the above embodiments and functionas a constituent part of the display devices of the above variousembodiments.

For better understanding of the color conversion component 10 providedby the embodiments of the application, the color conversion component 10will be described in detail below in conjunction with FIGS. 3 to 6.

Please also refer to FIG. 3, which is a schematic cross-sectional viewof the color conversion component 10 according to an embodiment of theapplication. The color conversion component 10 provided by theembodiment of the application comprises a light conversion layer 12. Thelight conversion layer 12 comprises a black matrix (BM) 121, colorconversion layers 122, and concave-convex structure layers 123.

The black matrix 121 has a plurality of through holes arranged in anarray. The black matrix 121 may be made of a black light absorbingmaterial and may be a black pigment or a colorant of a dye. In someembodiments, the material for the black matrix 121 is, for example,titanium black, lignin black, composite oxide pigment such as iron ormanganese, combination of the above pigments, and the like. By providingthe black matrix 121, mutual interference of lights passing throughdifferent through holes can be avoided.

The color conversion layers 122 are located at least within a portion ofthe through holes. And the color conversion layers 122 can emit lighthaving a wavelength range different from that of an incident light. Theconcave-convex structure layers 123 are arranged at leastcorrespondingly in each through hole accommodating a color conversionlayer 122. Each concave-convex structure layer is located on a lightincident side of the light conversion layer 122 and has aconcave-concave structure surface facing towards the respective colorconversion layer 122.

When the color conversion component 10 provided by the embodiments ofthe application is applied to a display device, the color conversioncomponent 10 is stacked with the back plate component 20 in a thicknessdirection X of the light conversion layer 12, and, each of the lightemitting units 221 is arranged corresponding to the respective throughhole in the black matrix 121 of the color conversion component 10respectively. The lights emitted from the light emitting units 221 canfunction as the incident lights of the color conversion component 10,and the lights emitted from at least a portion of light emitting units221 are converted into lights in a different wavelength range by thecolor conversion layers 122, thereby meeting the requirement forfull-color display of the display device. Meanwhile, the concave-convexstructure layers 123 arranged in a corresponding way can diffuse thelights, such that the lights can be uniformly distributed after passingthrough the light conversion layer, thereby enabling uniform intensitydistribution of the lights and ensuring the display effect of thedisplay device.

As an optional implementation, when employing blue light micro lightemitting diode chips as the light emitting units 221, in order tosatisfy the full-color display of the display device, the colorconversion layer 122 may comprise a red conversion unit and a greenconversion unit distributed in an array. The red conversion unitconverts the light of its corresponding light emitting unit 221 into ared sub-pixel. The green conversion unit converts the light of itscorresponding light emitting unit 221 into a green sub-pixel. The colorconversion units may not be provided or transparent color conversionunits may be provided over the remaining portion of the light emittingunits 221 to maintain the original color of the light emitting units 221and form blue sub-pixels, in order to ensure that the display device canaccomplish full-color display.

In some optional examples, the red conversion unit comprises aphotoluminescent material for generating a red light, for example, amaterial formed by mixing a red quantum dot with photoresist or bymixing a material in which a red organic photoluminescent material withphotoresist. In some optional examples, the green conversion unitcomprises a photoluminescent material for generating a green light, forexample, a material formed by mixing a green quantum dot withphotoresist or by mixing a material in which a green organicphotoluminescent material with photoresist. Wherein the photoresist isnegative glue and the quantum dot layer is a quantum dot materialcapable of forming a specific excitation wavelength, comprising but notlimited to a shell made of zinc sulfide (ZnS), and may be one or more ofcadmium selenide (CdSe), cadmium telluride (CdTe), cadmium sulfide(CdS),indium phosphide (InP) and perovskite. The quantum dot materialalso comprises a scatterer, such as titanium oxide, or silicon dioxide,etc.

When the color conversion layer 122 comprises a transparent conversionunit, optionally, the transparent conversion unit comprises atransparent material such as transparent photoresist, transparentpolymer (such as poly methyl meth acrylate, PMMA) and the like. It is tobe appreciated that the transparent conversion unit is not required toconvert the blue light emitted from the blue light micro light emittingdiode, but is used for the blue lights emitted by the blue microlightemitting diode to directly pass through.

In some optional examples, a concave-convex structure layer may beprovided in each through hole. By the above arrangement, the incidentlight passing through each through hole of the color conversioncomponent 10 can be diffused to satisfy the uniformity requirement oflight intensity distribution for the display device better.

As an optional implementation, each of the concave-convex structurelayers is arranged in the same layer. By arrangement of each of theconcave-convex structure layers in the same layer, the uniformity oflight intensity distribution can be ensured better while eachconcave-convex structure surface can be simultaneously manufactured andformed, such that the forming process of the color conversion component10 is simplified in order to save production time and to increaseproduction efficiency.

In some optional embodiments, the light conversion layer 12 may furthercomprise a barrier layer 125 formed on an inner wall of the respectivethrough hole. The forming of the color conversion layer 122 may bebetter satisfied by providing the barrier layer 125.

In some optional embodiments, the barrier layer 125 located inside therespective through hole is looped to form an orifice. Optionally, theorifice formed in each through hole may be arranged coaxially with thatthrough hole. The orifice has a first opening 125 a and a second opening125 b opposite to the first opening. The second opening 125 b has a sizelarger than that of the first opening 125 a. The concave-convexstructure layer 123 is arranged close to the respective first opening125 a, and the color conversion layer 122 is arranged within therespective orifice. By defining the orifice encircled and formed by thebarrier layer 125 in the above structural type, a light entering theorifice from the first opening 125 a may be emitted out of the secondopening 125 b in a collimated manner, thereby improving the displayeffect. In the application, the concave-convex structure layer 123 isarranged close to the respective first opening 125 a refers to adistance between the concave-convex structure layer 123 and the firstopening 125 a is smaller than that between the concave-convex structurelayer 123 and the second opening 125 b.

As an optional implementation, the material of the barrier layer 125 maybe the same as that of the concave-convex structure layer 123, therebyaccomplishing the connection between the concave-convex structure layer123 and the barrier layer 125 better and ensuring the limiting effect ofthe color conversion layer 122 better.

In some optional embodiments, the barrier layer 125 may be formedintegrally with the respective concave-convex structure layer 123. Theforming process of the color conversion component may be simplified, andthe display effect of the display device may be further optimized. In anoptional implementation, a complete barrier material layer may be formedat first in the actual manufacturing process. A first groove with aconcave-convex structure surface and a second groove for accommodatingthe black matrix are formed in the barrier material layer by impressingprocess. Then a black matrix material is filled in the second groove, soas to accomplish the integral formation of the barrier layer 125 and theconcave-convex structure layer 123. Of course, in some other examples,the black matrix with through holes may be formed at first, and thethrough holes are filled with barriers. Then the barrier layer 125 andthe concave-convex structure layer 123 are integrally formed byimpressing.

As an optional implementation, a width-to-thickness ratio of the blackmatrix 121 between two adjacent through holes is 2. For example, theblack matrix 121 has a width of 5 um and the depth may 10 um. Comparedto the structure form of the black matrix 121 in the prior arts, thereis an advantage that the light barrier effect can be ensured withoutaffecting the resolution of the display device.

As an optional implementation, the concave-convex structural surface hasa protrusion 123 a extending in a thickness direction of the lightconversion layer. With the above arrangement, the light emitted from thelight emitting unit 221 may pass through the protrusion 123 a and bescattered to the periphery of the protrusion 123 a in order to overcomethe defect that the light emission of the micro light emitting diode isgenerally strong in the middle and weak in the periphery and ensure theuniformity of light intensity after conversion by the light conversionlayer 12.

Optionally, the amount of the protrusions 123 a comprised in eachconcave-convex structural surface may be one, and when the amount isone, it may be located in or near the middle of the correspondingthrough hole. Of course, the amount of the protrusions 123 a comprisedin each concave-convex structure surface may be plural, and when theamount is plural, the plurality of projections 123 a may be distributedin rows and columns. With the above arrangement, the light intensitysurrounding the periphery of the light emitting unit 221 after the lightis emitted can be enhanced, so as to ensure the uniformity of lightintensity of the display device to which the color conversion componentis applied such that it has a better display effect.

Referring to FIG. 3, as an optional implementation, the cross section ofthe protrusion 123 a comprised in the concave-convex structure surfacein the thickness direction X of the light conversion layer 12 may be apolygon, such as a triangle, a rectangle, or a trapezoid. That is, theprotrusions 123 a may be of a conical shape, a cylindrical shape, or afrustum shape. The projections 123 a of the concave-convex structuresurface in the above structural form can diffuse the light emitted fromthe light emitting unit 221 to form a uniform light re-excitation colorconversion layer 122, thereby achieving uniformly distribution of thelight emitting units 221 after color conversion by the color conversionlayer 122.

Also referring to FIG. 4, the light conversion layer 12 of the colorconversion device 10 provided by each of the above embodiments mayfurther comprise a reflective layer 124. The reflective layer 124 isarranged on the inner wall of the through hole and surrounds theconcave-convex structure surface. By providing the reflective layer 124,the problem of light interference between adjacent sub-pixels can beprevented while the light after color conversion by the light conversionlayer 12 can be reflected, so as to improve the light emittingefficiency of the light conversion layer 12.

The color conversion component 10 may further comprise first distributedBragg reflection films arranged in one-to-one correspondence with eachof the through holes. The first distributed Bragg reflection film islocated on a side of the respective color conversion layer 122 facingtowards the concave-convex structure layer 123, and is configured toallow transmission of a light in the same wavelength range as theincident light.

With the above arrangement, an incident light, such as the light emittedfrom the light emitting unit 221, is incident upon the color conversionlayer 122 through the first distributed Bragg reflection film and theconcave-convex structure layer 123 in sequence when emitted to the colorconversion component 10.

Each first distributed Bragg reflection film may be formed by stackingtwo films having a higher refractive index and a lower refractive indexrespectively. The combination of the two films comprises, but is notlimited to, a TiO₂ film and an Al₂O₃ film, a TiO₂ film and a SiO₂ film,and a Ta₂O₅ film and an Al₂O₃ film, a HfO₂ film and a SiO₂ film, in eachcombination of which the former is the film of the higher refractiveindex and the latter is the film of the lower refractive index.

In some embodiments, the first distributed Bragg reflection films arefurther configured to reflect a light in at least one other wavelengthrange at the same time.

Each first distributed Bragg reflection films is located at the lightincident side of the respective concave-convex structure layer 123, thatis, between the back plate component 20 and the color conversion layer122. Optionally, the first distributed Bragg reflection films may bearranged within the respective through holes, and of course, may also bearranged outside and opposite to the respective through holes.

The first distributed Bragg reflection film allow a light emitted fromthe light emitting unit 221 to enter the respective through hole andreflects a light of another color converted in the through hole, suchthat all the converted lights are emitted towards the light exiting sideopposite to the back plate component 20, so as to improve theutilization rate of the light energy.

In some embodiments, that color conversion component may furthercomprise second distributed Bragg reflection films arranged incorrespondence with the color conversion layers 122. The seconddistributed Bragg reflection film is located on a side of the respectivecolor conversion layer 122 facing away from the concave-convex structurelayer 123, and is configured to allow transmission of the light emittedby the color conversion layer 122 in the corresponding through hole.

Each second distributed Bragg reflection film may be formed by stackingtwo films having a higher refractive index and a lower refractive indexrespectively. The combination of the two films comprises, but is notlimited to, a TiO₂ film and an Al₂O₃ film, a TiO₂ film and a SiO₂ film,and a Ta₂O₅ film and an Al₂O₃ film, a HfO₂ film and a SiO₂ film, in eachcombination of which the former is the film of the higher refractiveindex and the latter is the film of the lower refractive index.

The second distributed Bragg reflection films are configured to allowtransmission of the lights emitted by the color conversion layers 122 inthe corresponding through holes. In some embodiments, the seconddistributed Bragg reflection films are further configured to reflect alight in at least one other wavelength range at the same time. In someembodiments, the second distributed Bragg reflect films may beconfigured to reflect lights in the same wavelength range as theincident lights, such that incident lights which are not absorbed by thecolor conversion layers 122 are reflected to the color conversion layers122 again for excitation conversion.

The second distributed Bragg reflection film is located on a side of therespective color conversion layer 122 facing away from theconcave-convex structure layer 123, i.e., in some embodiments, the sidecloser to the outgoing light in the color conversion assembly 10. Again,the second distributed Bragg reflection film may be located within oroutside the respective through hole. The second distributed Braggreflection films allow transmission of the lights emitted by the colorconversion layers 122 in the corresponding through holes and reflectlights in at least one other wavelength range, such that the purity ofthe lights emitted by the corresponding through holes is higher, andwhen the incident lights are reflected by the second distributed Braggreflection films, the utilization ratio of light energy can also beimproved.

The color conversion component 10 provided by the above embodiments mayfurther comprise a first substrate 11 located at one side of the lightconversion layer 12 in the thickness direction X. Optionally, the colorconversion component 10 may further comprise a second substrate 13arranged opposite to the first substrate 11, which may be located on theother side of the light conversion layer 12 in the thickness directionX.

Optionally, each of the first substrate 11 and the second substrate 13may be a colorized substrate, and the material thereof may be glass or apolymer material, such as polycarbonate, polyvinyl chloride, polyester,acrylic, or the like. With the above arrangement, it is possible tofurther facilitate the forming of the light conversion layer 12 whilefacilitating the connection between the color conversion component 10and the corresponding parts of a display device when applied to thedisplay device.

Referring to FIG. 5, in each of the above embodiments, the cross sectionof the protrusion 123 a of the concave-convex structure surface of thelight conversion layer 12 in the thickness direction X is illustrated asa polygon, which is an optional manner, but not limited thereto. In someother examples, the cross section of the protrusions 123 a of thelight-converting layer 12 in the thickness direction X may also be anarc, which may be a circular arc or an elliptical arc, either a superiorarc or a inferior arc. Correspondingly, the structural shape of eachprotrusion 123 a may also be a partial structure of a sphere orellipsoid, and the color conversion module 10 in the above structuralform can also meets the requirement of the display device for theuniformity of light intensity distribution.

Please also refer to FIGS. 2 and 6, in which FIG. 6 shows a partialcross-sectional view of the baffle component 30 of an embodiment of theapplication. The display device provided by the above variousembodiments further comprises a baffle component 30 arranged between theback plate component 20 and the color conversion component 10. Thebaffle component 30 is provided with a light transmission hole 33 at theposition corresponding to each light emitting unit 221.

The baffle component 30 comprises a first baffle layer 31 and a secondbaffle layer 32 laminated in the thickness direction X. The first baffle31 is located between the back plate component 20 and the second bafflelayer 32. Optionally, the first barrier layer 31 is made of a blacklight absorbing material and may be for example a black pigment or acolorant of a dye. It may be titanium black, lignin black, compositeoxide pigment such as iron/manganese, combination of the above pigments,and the like, for blocking a light emitted from the light emitting unit221 below, thereby reducing interference between pixels.

The second barrier layer 32 is made of a light reflecting material.Since the light emission of the quantum dot material isomni-directional, the light beam emitted from the colorized film can bereflected when the light propagates to the second barrier layer 32,thereby improving the light emitting efficiency of the colorized film.The reflecting material may be silver, aluminum, or the like, forreflecting the light from the color conversion layer 122 above, which isadvantageous for improving the light emitting efficiency of the colorconversion component 10.

In each of the above embodiments, the light emitting unit 221 is a bluelight micro light emitting diode chip, which is an optional manner. Insome other examples, the light emitting unit 221 may also employ anultraviolet light micro light emitting diode. In this case, a colorconversion layer is located in each through hole, and the colorconversion layer comprises a red conversion unit, a green conversionunit and a blue conversion unit, which is also possible to meet thecolorized display requirement of the display device.

In conclusion, in the color conversion component 10 provided by theembodiment of the application, since it comprises a light conversionlayer 12 which comprises a black matrix 121, color conversion layers122, and concave-convex structure layers 123, it is possible to emitlights in a wavelength range different than that of the incident lightsby the color conversion layers 122, so as to meet the full-color displayrequirement of the display device. Meanwhile, the concave-convexstructure layers 123 arranged in a corresponding way can diffuse thelights, such that the lights can be uniformly distributed after passingthrough the light conversion unit, thereby enabling uniform intensitydistribution of the lights and ensuring the display effect of thedisplay device.

In the display device provided by the embodiments of the application,since it comprises the color conversion component 10 of the aboveembodiments, such that the light intensity of the lights passing throughthe color conversion component 10 is uniform, and the correspondinglyarranged baffle component 30 can further avoid the interference of thelights between the sub-pixels while improving the light emittingefficiency, such that the display device as a whole has a better displayeffect, which is easy to popularize and use.

Although the application has been described in reference to preferredembodiments, the various technical features mentioned in variousembodiments can be combined in any way without departing from the scopeof the application and in particular, as long as there is no structuralconflict. The application is not limited to the specific embodimentsdisclosed herein, but comprises all the technical solutions which fallinto the scope of the claims.

What is claimed is:
 1. A color conversion component, wherein the colorconversion component comprises a light conversion layer comprising ablack matrix, color conversion layers, and concave-convex structurelayers; the black matrix has a plurality of through holes arranged in anarray; the color conversion layers are located within the through holesand emitting a light whose wavelength range being different from that ofan incident light; and the concave-convex structure layers are arrangedat least correspondingly in each of the through holes accommodating thecolor conversion layers, and each of the concave-convex structure layeris located on a light incident side of the light conversion layer andhas a concave-convex structure surface facing towards the respectivecolor conversion layer.
 2. The color conversion component according toclaim 1, wherein each of the through holes is provided with therespective concave-convex structure layer therein.
 3. The colorconversion component according to claim 2, wherein the concave-convexstructure layers are arranged in the same layer.
 4. The color conversioncomponent according to claim 1, wherein the light conversion layerfurther comprises a barrier layer formed on an inner wall of therespective through hole.
 5. The color conversion component according toclaim 4, wherein the material of the barrier layer is the same as thatof the respective concave-convex structure layer.
 6. The colorconversion component according to claim 4, wherein the barrier layer isformed integrally with the respective concave-convex structure layer. 7.The color conversion component according to claim 4, wherein the barrierlayer located inside the respective through hole is looped to form anorifice in which the respective color conversion layer is arranged, theorifice having a first opening and a second opening opposite to thefirst opening , the second opening having a size larger than that of thefirst opening, a distance between the concave-convex structure layer andthe first opening being smaller than that between the concave-convexstructure layer and the second opening.
 8. The color conversioncomponent according to claim 1, wherein the concave-convex structuresurface has a protrusion extending in a thickness direction of the lightconversion layer.
 9. The color conversion component according to claim8, wherein the cross section of the protrusion in the thicknessdirection of the light conversion layer is an arc or a polygon.
 10. Thecolor conversion component according to claim 8, wherein eachconcave-convex structure surface comprises a plurality of protrusionsarranged in rows and columns respectively.
 11. The color conversioncomponent according to claim 8, wherein each concave-convex structuresurface comprises one protrusion located in the middle of the respectivethrough hole.
 12. The color conversion component according to claim 1,wherein a width-to-thickness ratio of the black matrix between twoadjacent through holes is
 2. 13. The color conversion componentaccording to claim 1, wherein the light conversion layer furthercomprises a reflective layer arranged on an inner wall of the respectivethrough hole and surrounding the respective concave-convex structuresurface.
 14. The color conversion component according to claim 1,wherein the color conversion component further comprises: firstdistributed Bragg reflection films arranged in one-to-one correspondencewith each of the through holes, the first distributed Bragg reflectionfilms being located on the light incident sides of the respectiveconcave-convex structure layers, the first distributed Bragg reflectionfilms being configured to allow transmission of the lights in the samewavelength range as the incident lights; and/or second distributed Braggreflection films arranged in one-to-one correspondence with the colorconversion layers, the second distributed Bragg reflection films beinglocated on sides of the color conversion layers facing away from theconcave-convex structure layers, the second distributed Bragg reflectionfilms being configured to allow transmission of the lights emitted bythe color conversion layers in the corresponding through holes.
 15. Thecolor conversion component according to claim 1, wherein the colorconversion component further comprises: a first substrate located at aside of the light conversion layer in a thickness direction thereof andconnected to the light conversion layer; a second substrate arrangedopposite to the first substrate, the second substrate being located onthe other side of the light conversion layer in the thickness directionthereof and connected to the light conversion layer.
 16. The colorconversion component according to claim 15, wherein the first substrateand the second substrate are colorized substrates respectively.
 17. Adisplay device, wherein the display device comprises: a back platecomponent comprising a drive back plate and a light emitting layerarranged on the drive back plate, the light emitting layer comprising aplurality of light emitting units distributed in an array and aretaining wall, by which the adjacent light emitting units beingseparated from each other; a color conversion component according toclaim 1, the color conversion component being stacked and abuttedagainst the back plate component in a thickness direction of the lightconversion layer, each of the light emitting units being arrangedcorresponding to the respective through holes of the color conversioncomponent in the thickness direction respectively.
 18. The displaydevice according to claim 17, wherein the display device furthercomprises a baffle component arranged between the back plate componentand the color conversion component, the baffle component being providedwith a light transmission hole at the position corresponding to each ofthe light emitting units.
 19. The display device according to claim 18,wherein the barrier component comprises a first barrier layer and asecond barrier layer laminated in the thickness direction, the firstbaffle layer being located between the back plate component and thesecond baffle layer, the first barrier layer being made of a black lightabsorbing material, the second barrier layer being made of a lightreflecting material.
 20. The display device according to claim 17,wherein the light emitting units are blue light micro light emittingdiode chips or ultraviolet micro light emitting diodes.